Bible Answer: That is a great question Jesus' disciples asked 2,000 years ago.
But God does not want us to know when Jesus will return. However,
many individuals have claimed they knew when He would return.
While Jesus lived and walked on this earth before His death, He
implied that He did not know saying that only the Father knew (Matthew 24:36). Later after His death and resurrection and just
before He returned to heaven, Jesus' disciples asked when He would
return. Listen to the answer Jesus gave.

And so when they had come together, they were asking Him, saying,
"Lord, is it at this time You are restoring the kingdom to Israel?"
He said to them, "It is not for you to know times or epochs which
the Father has fixed by His own authority; (NASB) Acts 1:6-7

This time Jesus did not say that He did not know the time of the
end. He merely said we cannot know, but we do know that He will
come some day.Jesus' Second Coming. Jesus tried to encourage His disciples just before He was going
to be betrayed by Judas. So He told His disciples that He was
going to prepare a place for them and then return to get them.

Let not your heart be troubled; believe in God, believe also in
Me. In My Father's house are many dwelling places; if it were
not so, I would have told you; for I go to prepare a place for
you. And if I go and prepare a place for you, I will come again,
and receive you to Myself; that where I am, there you may be also.
(NASB) John 14:1-3

Jesus was very clear that He will return. He also said the Father
had given Him a kingdom and He promised His disciples that they
will reign with Him.

My Father has granted Me a kingdom, I grant you that you may eat
and drink at My table in My kingdom, and you will sit on thrones
judging the twelve tribes of Israel. (NASB) Luke 22:29-30

How soon will Jesus come? Saints down through history have been waiting for Jesus to return.
It started in the Old Testament. These saints were told the Day
of the Lord was near (Isaiah 13:6). The New Testament saints have
been told the same thing.

The Lord is not slow about His promise, as some count slowness,
but is patient toward you, not wishing for any to perish but for
all to come to repentance. (NASB) 2 Peter 3:9

I find this wonderful. It reveals something about the character
of God that I have not fully understood. It gives me insight into
God. The fact the Old Testament saints were told the Day of the
Lord was near and yet nothing happened by the time Jesus arrived
reveals that time is relative to God. Our long periods of time
are short to the Lord. He really is eternal. He is timeless.

Conclusion: Here is the conclusion of the book of Revelation.

Behold, I am coming quickly, and My reward is with Me, to render
to every man according to what he has done. (NASB) Revelation
22:12He who testifies to these things says, "Yes, I am coming quickly."
Amen. Come, Lord Jesus. (NASB) Revelation 22:20